Issue #3276247 by jasonfelix, mherchel, Amstercad, jaydee1818, Mark LaCroix,...

    ];

    // Populating extra options for top container.

    foreach (explode("\n", theme_get_setting('b5_top_container_config')) as $line) {

      $values = explode("|", trim($line));

    foreach (explode("\n", theme_get_setting('b5_top_container_config') ?? '') as $line) {

      $values = explode("|", trim($line) ?? '');

      if (is_array($values) && (count($values) == 2)) {

        $options_top_container += [trim($values[0]) => trim($values[1])];

      }